ERA5 hourly data on pressure levels from 1979 to present available at https://doi.org/10.24381/cds.bd0915c6 from Hersbach et al. (2018)

Hersbach H, Bell B, Berrisford P, Biavati G, Horányi A, Muñoz-Sabater J, Nicolas J, Peubey C, Radu R, Rozum I, Schepers D, Simmons A, Soci C, Dee D and ThépautJ N 2018 ERA5 hourly data on pressure levels from 1979 to present Copernicus Climate Change Service (C3S) Climate Data Store (CDS)

Needed variables and location:
850 hPa specific humidity in g/g      path_hus850='./H850/'
700 hPa specific humidity in g/g      path_hus700='./H700/'
850 hPa temperature in Kelvin         path_ta850='./T850/'  
700 hPa temperature in Kelvin         path_ta700='./T700/' 
500 hPa temperature in Kelvin         path_ta500='./T500/'
